condition mean min max ZT0-3 24.466 24.466 24.466 ZT4-7 16.9913 16.9913 16.9913 ZT8-11 20.7531 20.7531 20.7531 ZT12-15 33.1358 33.1358 33.1358 ZT16-19 46.0741 46.0741 46.0741 ZT20-23 32.808350000000004 32.808350000000004 32.808350000000004